diff --git a/bsp/default/root_file_system/etc/wlanwatchdog.sh b/bsp/default/root_file_system/etc/wlanwatchdog.sh
new file mode 100755
index 00000000..75821e58
--- /dev/null
+++ b/bsp/default/root_file_system/etc/wlanwatchdog.sh
@@ -0,0 +1,164 @@
+#!/bin/ash
+
+# environment
+. "/tmp/environment" || exit 1
+
+# constants
+MINUTE=60
+HOUR=3600
+DAY=86400
+TIMEOUT_SHORT=$((4*$MINUTE))
+TIMEOUT_MEDIUM=$((29*$MINUTE))
+TIMEOUT_LONG=$DAY
+STATEFILE="/tmp/wlanwatchdogstate"
+DEBUGFILE="/root/wlanwatchdog_debug.log.gz"
+
+# variables
+STATE=
+SINCE=
+
+# functions
+debug_output() {
+  echo "==== DEBUG OUTPUT ===="
+  echo "date: $(date)"
+  echo "=== INTERFACES ==="
+  ifconfig 2>&1
+  echo "=== BATMAN ==="
+  echo "== ORIGINATORS =="
+  batctl o 2>&1
+  echo "== STATISTICS =="
+  batctl s 2>&1
+  echo "== GATEWAYS =="
+  batctl gwl 2>&1
+  echo "=== BRIDGE ==="
+  echo "== $BRIDGE_INTERFACE =="
+  brctl showmacs $BRIDGE_INTERFACE 2>&1
+  echo "=== CONNECTIVITY TESTS ==="
+  echo "== PING GATEWAY OVER MESH =="
+  ping -6 -c3 fe80::201:2ff:fe03:405%$BRIDGE_INTERFACE 2>&1
+  echo "== PING GATEWAY OVER INTERNET =="
+  ping -4 -c3 vpn.freifunk-ol.de 2>&1
+  echo "=== WLAN ==="
+  echo "== $WLAN_CLIENT_INTERFACE =="
+  iw dev $WLAN_CLIENT_INTERFACE station dump 2>&1
+  echo "== $WLAN_MESH_INTERFACE =="
+  iw dev $WLAN_MESH_INTERFACE station dump 2>&1
+  echo "== SCAN =="
+  iwlist scanning 2>&1
+  echo "=== WATCHDOG LOG ==="
+  cat "/var/log/wlanwatchdog.log"
+}
+
+get_time() {
+  date +%s
+}
+
+count_originators() {
+  local COUNT=0
+  if [ -n "$BATMAN_INTERFACE" ]; then
+    COUNT=$(tail -n +3 /sys/kernel/debug/batman_adv/$BATMAN_INTERFACE/originators 2> /dev/null | wc -l)
+  fi
+  echo $COUNT
+}
+
+count_clients() {
+  local COUNT=0
+  local NUMBER=
+  if [ -n "$BRIDGE_INTERFACE" ] && [ -n "$WLAN_CLIENT_INTERFACE" ]; then
+    NUMBER=$(brctl showstp $BRIDGE_INTERFACE 2> /dev/null | grep $WLAN_CLIENT_INTERFACE | cut -d" " -f2 | tr -d "()")
+  fi
+  if [ -n "$BRIDGE_INTERFACE" ] && [ -n "$NUMBER" ]; then
+    COUNT=$(brctl showmacs $BRIDGE_INTERFACE 2> /dev/null | cut -f1 | grep "$NUMBER" | wc -l)
+  fi
+  echo $COUNT
+}
+
+count_neighbours() {
+  local COUNT=0
+  #FIXME: this counts all nodes that accessable via the WLAN mesh interface
+  if [ -n "$BATMAN_INTERFACE" ] && [ -n "$WLAN_MESH_INTERFACE" ]; then
+    COUNT=$(tail -n +3 /sys/kernel/debug/batman_adv/$BATMAN_INTERFACE/originators | grep "$WLAN_MESH_INTERFACE" | wc -l)
+  fi
+  echo $COUNT
+}
+
+scan_wlan() {
+  #FIXME: if you can; is there an easier way to get the current frequency?
+  #FIXME: this should reanimate the wlan driver; do passive and active scanning the job equally well?
+  local FREQUENCY=$(iwlist $WLAN_MESH_INTERFACE frequency 2> /dev/null | grep -o "Current Frequency=[0-9.]\+ GHz" | grep -o "[0-9.]*" | tr -d ".")
+  [ -n "$FREQUENCY" ] && iw $WLAN_MESH_INTERFACE scan freq $FREQUENCY passive 1> /dev/null 2> /dev/null
+}
+
+fsm_load() {
+  if [ -f "$STATEFILE" ]
+  then
+    STATE=""
+    SINCE=""
+    . "$STATEFILE" || return 1
+  fi
+}
+
+fsm_save() {
+  echo -e "STATE=${STATE}\nSINCE=${SINCE}" > "$STATEFILE" || return 1
+}
+
+fsm_entry() {
+  SINCE=$(get_time)
+  case $STATE in
+    pending)
+      scan_wlan
+    ;;
+    error)
+      if [ -n "$DEBUG" ] && [ $DEBUG -eq 1 ]; then
+        debug_output | gzip > ${DEBUGFILE}
+      fi
+      reboot
+    ;;
+  esac
+}
+
+fsm_transition() {
+local AGE=-1
+[ -n "$SINCE" ] && AGE=$(( $(get_time) - $SINCE ))
+local OLDSTATE=$STATE
+case $STATE in
+  working)
+    if [ $(count_neighbours) -eq 0 ] && [ $(count_clients) -eq 0 ]
+    then
+      STATE=pending
+    fi   
+  ;;
+  pending)
+    if [ $AGE -ge $TIMEOUT_MEDIUM ]
+    then
+      STATE=error
+    elif [ $(count_originators) -eq 0 ] && [ $AGE -ge $TIMEOUT_SHORT ]
+    then
+      STATE=error
+    elif [ $(count_neighbours) -gt 0 ] || [ $(count_clients) -gt 0 ]
+    then
+      STATE=working
+    fi
+  ;;
+  *)
+    if [ $AGE -ge $TIMEOUT_LONG ]
+    then
+      STATE=error
+    elif [ $(count_neighbours) -gt 0 ] || [ $(count_clients) -gt 0 ]
+    then
+      STATE=working
+    fi
+  ;;  
+esac
+if [ ! "$OLDSTATE" == "$STATE" ]
+then
+  echo "$(date) '$OLDSTATE' -> '$STATE'"
+  fsm_entry
+fi
+}
+
+# program
+fsm_load
+fsm_transition
+fsm_save
+